1
4
5
7
9
2
7
9
8
9
2
1
3
2
8
5
9
7
5
4
8
1
8
7
5
4
6
7
2
7
4
8
9
6

This Sudoku Puzzle has 49 steps and it is solved using Naked Single, Full House, Hidden Single, Uniqueness Test 1, Avoidable Rectangle Type 1 techniques.

Naked Single Explanation
Hidden Single Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 1 → 6 (Naked Single)
  2. Row 1 / Column 2 → 3 (Naked Single)
  3. Row 2 / Column 1 → 8 (Naked Single)
  4. Row 7 / Column 1 → 9 (Full House)
  5. Row 4 / Column 3 → 1 (Naked Single)
  6. Row 5 / Column 5 → 3 (Naked Single)
  7. Row 2 / Column 3 → 6 (Naked Single)
  8. Row 3 / Column 3 → 2 (Full House)
  9. Row 9 / Column 3 → 3 (Full House)
  10. Row 4 / Column 2 → 4 (Naked Single)
  11. Row 6 / Column 2 → 7 (Full House)
  12. Row 5 / Column 6 → 9 (Naked Single)
  13. Row 2 / Column 4 → 3 (Naked Single)
  14. Row 4 / Column 4 → 6 (Naked Single)
  15. Row 6 / Column 5 → 2 (Full House)
  16. Row 2 / Column 6 → 4 (Naked Single)
  17. Row 2 / Column 7 → 7 (Full House)
  18. Row 4 / Column 7 → 2 (Naked Single)
  19. Row 4 / Column 8 → 9 (Full House)
  20. Row 9 / Column 6 → 8 (Naked Single)
  21. Row 3 / Column 6 → 6 (Naked Single)
  22. Row 9 / Column 2 → 1 (Naked Single)
  23. Row 7 / Column 2 → 8 (Full House)
  24. Row 1 / Column 5 → 5 (Naked Single)
  25. Row 1 / Column 8 → 6 (Full House)
  26. Row 9 / Column 4 → 5 (Naked Single)
  27. Row 3 / Column 4 → 1 (Naked Single)
  28. Row 3 / Column 5 → 8 (Full House)
  29. Row 8 / Column 4 → 9 (Full House)
  30. Row 8 / Column 5 → 1 (Naked Single)
  31. Row 9 / Column 5 → 4 (Naked Single)
  32. Row 9 / Column 8 → 7 (Full House)
  33. Row 7 / Column 5 → 6 (Full House)
  34. Row 6 / Column 7 → 6 (Hidden Single)
  35. Row 7 / Column 8 → 1 (Hidden Single)
  36. Row 5 / Column 8 → 5 (Naked Single)
  37. Row 5 / Column 7 → 1 (Full House)
  38. Uniqueness Test 1: 3/4 in r3c89,r6c89 => r3c9<>3, r3c9<>4
  39. Row 3 / Column 9 → 5 (Naked Single)
  40. Row 3 / Column 7 → 3 (Naked Single)
  41. Row 3 / Column 8 → 4 (Full House)
  42. Row 8 / Column 7 → 5 (Full House)
  43. Row 6 / Column 8 → 3 (Full House)
  44. Row 6 / Column 9 → 4 (Full House)
  45. Avoidable Rectangle Type 1: 3/5 in r3c79,r8c79 => r8c9<>3
  46. Row 8 / Column 9 → 2 (Naked Single)
  47. Row 7 / Column 9 → 3 (Full House)
  48. Row 8 / Column 6 → 3 (Full House)
  49. Row 7 / Column 6 → 2 (Full House)
Show More...